/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package za.co.pas.jtorrenttracker.util;

/**
 *
 * @author alabuschagne
 */
public class Utils
{
    private final static char base64Array[] =
    {
        'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
        'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
        'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
        'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
        'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
        'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
        'w', 'x', 'y', 'z', '0', '1', '2', '3',
        '4', '5', '6', '7', '8', '9', '+', '/'
    };

    public static String base64Encode(String string)
    {
        String encodedString = "";
        byte bytes[] = string.getBytes();
        int i = 0;
        int pad = 0;
        while(i < bytes.length)
        {
            byte b1 = bytes[i++];
            byte b2;
            byte b3;
            if(i >= bytes.length)
            {
                b2 = 0;
                b3 = 0;
                pad = 2;
            }
            else
            {
                b2 = bytes[i++];
                if(i >= bytes.length)
                {
                    b3 = 0;
                    pad = 1;
                }
                else
                {
                    b3 = bytes[i++];
                }
            }
            byte c1 = (byte) (b1 >> 2);
            byte c2 = (byte) (((b1 & 0x3) << 4) | (b2 >> 4));
            byte c3 = (byte) (((b2 & 0xf) << 2) | (b3 >> 6));
            byte c4 = (byte) (b3 & 0x3f);
            encodedString += base64Array[c1];
            encodedString += base64Array[c2];
            switch(pad)
            {
                case 0:
                    encodedString += base64Array[c3];
                    encodedString += base64Array[c4];
                    break;
                case 1:
                    encodedString += base64Array[c3];
                    encodedString += "=";
                    break;
                case 2:
                    encodedString += "==";
                    break;
            }
        }
        return encodedString;
    }
}
